Definition of TDZE
TDZE stands for touchdown zone elevation and refers to the height above mean sea level (AMSL) of the highest point of the first 3,000 feet of the runway, excluding any rise due to the approach pavement. It is a crucial piece of information for pilots during the approach and landing phases of a flight.
The TDZE is used to determine the minimum altitude at which a pilot may descend on the approach to the runway. This is known as the minimum descent altitude (MDA). The MDA is calculated by adding the TDZE to the decision height or decision altitude (DA), which is the point at which the pilot must decide whether to continue with the approach or execute a missed approach.
The TDZE is prominently displayed on aviation charts and approach plates, allowing pilots to familiarize themselves with the unique characteristics of each runway they plan to land on. The height of the touchdown zone varies from runway to runway, depending on factors such as runway length, obstructions, and terrain.
In summary, the TDZE is a crucial piece of information used by pilots during the approach and landing phases of a flight to ensure a safe descent and landing.
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